Slot-making attachment for bolt-heading machines



(No Model.) 2 Sheets-Sheet 1.

S. UREN. SLOT MAKING ATTACHMENT FOR BOLT HEADING MACHINES.

No. 404,580. Patented June 4, 1889.

UNITED STATES PATENT OFFICE.

STEPHEN UREN, OF SACRAMENTO, CALIFORNIA.

SLOT-MAKING ATTACHMENT FOR BOLT-HEADING MACHINES.

SPECIFICATION forming part of Letters Patent No. 404,580, dated June 4, 18 89.

Application filed March 6, 1889- Serial No. 302,157. (No model.)

To aZZ whom it may concern:

Be it known that I, STEPHEN UREN, of Sacramento, Sacramento county, State of California, have invented an Improvement in Slot- Making Attachments for Bolt-IIeading Machines; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to that class of boltheading machines in which the bolt is confined and gripped between opposing 'dies, while a reciprocating plunger operates against the end of the bar and upsets it, so as to form the head of the bolt; and my invention consists in the hereinafter-described novel arrangement and combination of parts, which I shall hereinafter fully describe and claim;

Referring to the accompanying drawings for a more complete explanation of my invention, Figure 1 is a view of a bolt having the slotor keyway in its end. Fig. '2 is a plan of a bolt-heading machine. Fig. 3 is a vertical longitudinal section of the opposing dies. Fig. 4 is a vertical cross-section of die 0 on line Y Y of Fig. 3. Fig. 5 is a plan of the dies.

A is the frame or stand of the machine, having near one end the sliding carriage B, to which is clamped the movable die 0, opposing which and fixed to the stand is the stationary die D.- The carriage B is made to move back and forth by means of a togglelever E, which has attached to it a connecting-rod c, which is operated by eccentrics F upon the power-shaft G, all of these parts being the common and ordinary parts and mechanisms of a well-known bolt-heading machine.

H is the plunger, which upsets the end of the bar as it is held between the dies, said plunger being reeiprocated by a crank g on the power-shaft G in the usual manner.

T is a cutter attached to the die 0 and adapted to cut off the bar into bolt-lengths.

The ordinary operation of a machine of i this class is as follows: The bar from which the bolt is to be made is fed in between the dies, and thereupon the carriage moves inwardly, carrying its die 0 up so that the bar is gripped tightly between the dies 0 and D, and then the plunger H advances and upsets the end of the bar, forming the bolt-head.

In order to provide for my attachment,

whereby a slot such as is represented by 0c is made in the end of the bolt X, Fig. 1, I have the following construction: The movable die 0 is formed in two parts, and between the adjacent faces of each part is fitted and held firmly a flat punch-strip I, the end of which projects beyond the grooved face of the die, as shown. This punch lies between two holding or guard plates J, the ends of which also project beyond the curved face of the die and lie immediately above and below the end of the punch-strip. The fixed die D is also madein two parts, and in a socket in each partis fitted the two-part shoe K, between which is formed a punchway is, adapted to receive the punchstrip I of the movable die 0. This keyway continues backwardly in the halves of the dieand communicates with an opening L, made vertically through the said die. The face of the keyway-shoe is made curved to conform to the curved face of the die, so as to receive the bar, while the end of the die is cutout at m above and below the keywayshoe, so as to receive the projecting ends of the guard-plates. In the movable die 0 are made downwardly-extending slots 0 on each side of the punch and guard-plates, and in these slots fit the flanges p of the releasingarm P, which is secured to the fixed die.

The operation of my attachment is as follows: The bar which is to be formed into a bolt is. fed in between the dies, as heretofore described. The movable die now approaches the bar, and its guard-plates pass aboveand below it, and immediately the punch coming in contact with it passes through it, forming the slot or keyway 00, said punch entering the pu'nchway 7c of the 'fixed die, While the guardplates enter the sockets m in said die, thereby holding the bar firmly and preventing it from spreading up and down, as it would have a tendency to do if unprotected while the punch was passing through it. Immediately after the bar is thus punched it is gripped by the fully-closing dies, and the plunger coming up heads the bolt, as heretofore described.

The movable die now recedes, withdrawing its punch from the slot orkeyway it has made, said punch moving out easily from the bolt without clamping, and the flanges of the arm P coming in contact with the bolt keep it from sticking in its seat and positvely discharge it. The punched-out material is discharged through the vertical opening Lin the fixed die.

Having thus described my invention, What I claim as new, and desire to secure by Let ters Patent, :is-

1. In a bolt-headingmachine and. in combination with its dies, between which the baris clamped, a fixed punch in one die adapted to make a slot or keyway in the end of the belt, a punchway in the other die for receiving the punch after it passes through the bolt, and a guard plate for preventing the bolt from spreading, substantially as described.

2. In a bolt-heading machine and in combination with its dies, between which the baris clamped, a fixed punch in one die adapted to form a slot or keyway in the end of the belt, a fixed guard plate above and below said punch for preventing the bolt from spreadin as the punch passes through it, and suitable ways in the opposing die for receiving the punch and guard-plates, substaiitially as described.

In a bolt-heading machine, the movable die 0 and the fixed die 1), between the faces of which the bar is clamped, and a reciprocating plunger for upsetting the end of the bar to form the head of the bolt, in combination with the punch-strip secured in and projeeting from the face of the movable die and adapted to make the slot or keyway in the end of the bolt, the punclnvay in the opposing face of the fixed die adapted to receive the punchstrip, an d a guard-plate for preventing the boltflOlll spreading, substantially described.

at. In a bolt-heading machine, the movable die 0 and the fixed die D, between which the bar is clamped, and the reciprocating plunger for upsetting the end of the bar, in combination with the punch-strip projecting from the face of the movable die and adapted to make a slot or keyway in the end of the bolt, the projecting guard-plates above and below said punch-strip and secured to the movable die, and the ways in the opposing fixed die for receiving the punch-strip and the guard-plates, substantially as described.

5. In a bolt-heading machine and in combination with the opposing dies by which the bar is gripped and held, said dies being made in two parts, as described, in combination with the independent guard-plates seen red between the parts of one of the dies and projecting from its face,the independent punchstrip secured between said guard-plates and projecting from the face of the die, and the grooved punehway-shoes secured between the parts of the opposing die, substantially as described.

In witness whereof I have hereunto set my hand.

STEP] IEN UREN.

Witnesses:

(J. N. PosT, T. J. 'Dunwon'rn. 

